EP1078866A2 - Method, device and package for wrapping the package around block-shaped body - Google Patents

Abstract

The packing for blocks of butter, margarine and similarly shaped products takes the form of a cover (10) which is formed of an approximately square section cut from a strip (2), and is folded around the product in the manner of an envelope with diagonally opposite corners. Independent claims are also included for: (1) a method where rotation of the product to be packed relative to the cover (10) in such a way that the vertical sides of the base area approximately face the corners of the cover; and (2) an apparatus for packing such products.

Description

The invention first relates to a package for wrapping block-shaped Bodies, in particular cube-shaped or cuboid products, such as butter, Margarine, soup paste, yeast or the like, with one from a web of material tailored and folded sleeve.

Packaging of the type in question is primarily wrapped or wrapping pasty products such as butter, margarine or the like known. As a rule, the pasty product is packed in the Way that first with the help of a folding stamp a flat cut of a packaging material to form an upwardly open envelope by a folding tool, for example a folding box is pushed through. After filling the product into the case the more or less upward folding flaps of the cover either folded inwards in the manner of a bottom fold or a forehead fold, so that the filled product is enclosed on all sides. Especially when it comes to folding the floor comparatively large areas of the folding flaps covering one another, so that comparatively much packaging material is required. In addition, the bottom and forehead folds the considerable disadvantage that in both cases with a cuboid or cuboid Product three areas are interrupted by folding creases. This will not only adversely affects the appearance of the pack, but also just stand comparatively few smooth surfaces that do not have any creases, for example for labeling - such as printing or the like - available. Finally bottom-folded and forehead-folded packs are comparatively difficult open, because you have to open the pack with your fingers behind you the inside of the folding tab must be gripped, with butter, margarine or the like inevitably in contact with the sticky surface of the filled product is coming.

The invention has for its object a packaging of the type mentioned to create, which is characterized by a comparatively low consumption of packaging distinguished and can be opened easily and conveniently. In addition, there should be a procedure be proposed that the wrapping in particular cubic or cuboid pasty products with the lowest consumption of packaging material. Finally, a device is to be created for conveniently opening packaging of the type in question is simple and inexpensive to manufacture.

This task is used in particular for wrapping block-shaped bodies Cube or cuboid products, such as butter, margarine, soup paste, yeast or similar suitable packaging of the type mentioned solved in that the envelope is formed by an approximately square blank of the material web and with diagonally opposite folding tips in the manner of an envelope fold around the block-shaped body is wrapped around.

Depending on the product dimensions, it is also conceivable that the shell of a essential rhombus-shaped cut with folding lengths of different lengths is.

It is essential that at least on the opening side of the packaging in the Corner folds are present on diagonal grasp the opposite ends and the top of the packaging around the corners. As a result, the corners are particularly against pasty products Impressions or damage better protected.

The one used to make the cut and folded blanks Material web can be made of a plastic film, for example made of oriented polypropylene be formed, preferably made of paper laminated with aluminum. Of course but paper and / or other suitable materials are also suitable.

It has turned out to be particularly favorable if an outer folding tip via an adhesive point, preferably a permanent adhesive point with one underneath lying folding tip is connected or with a pressure sensitive adhesive with the underlying Folding tip is detachably connected. With appropriately coated packaging materials is a full or partial gluing, gluing, sealing under temperature and / or Possible pressure.

The object underlying the invention is in procedural terms solved in that from the web of material to be rolled into a cube or cuboid-shaped product adapted, approximately square or rhombus-shaped Cut and cut relative to the base surface of the to be wrapped Body at an angle forming a diagonally opposite folding tip is folded around the body like an envelope. Because of this angular position The cuts ensure that the product is wrapped asymmetrically. Arise Folding tips of different lengths, with which the product can be used with the least possible Packaging consumption can be encased.

The procedure according to the invention is particularly suitable for such wrappings, the substantially flat cut with the aid of a folding stamp for formation an envelope that is open on one side is pushed through a folding tool. A blank used to wrap the product is in this case by one of a roll of material strip cut off approximately square and each according to the dimensions of the product to be wrapped relative to the folder fed at an angle.

For certain product dimensions, it has proven to be advantageous if the Cutting edges of the cut lying transversely to the transport direction are not at right angles, but rather obliquely, at an angle of up to 15 °. In this way This creates two diagonally opposite, acute-angled folding lobes, whose Peaks lie essentially in the extension of the center line of the folding stamp. On one of the elongated folding tabs can be attached to itself in a relatively simple manner even fold back the folded handle section, which makes handling the pack easier made possible by opening the packaging on this handle part without having to Opening the package comes into contact with the product.

Figur 1

eine Verpackungslage als Rundläufer zur Herstellung einer erfindungsgemäßen Verpackung,

Figur 2

eine Verpackung nach der Erfindung in vergrößertem Maßstab,

Figur 3

eine Aufsicht auf einen Verpackungs-Zuschnitt sowie einen dazu angeordneten Faltstempel der Verpackungsanlage,

Figur 4

eine perspektivische Darstellung eines mit dem Faltstempel der Verpackungsanlage zusammenwirkenden Faltwerkzeugs,

Figur 5

eine Einzelheit des Faltwerkzeugs,

Figur 6

einen Teil einer Hüllenbildungsstation mit Faltdreiecken,

Figur 7

einen Teil der Hüllenbildungsstation mit Faltleisten,

Figur 8

einen Teil der Hüllenbildungsstation mit einem Faltkasten,

Figur 9

eine in der Hüllenbildungsstation gebildete Hülle,

Figuren 10 bis 16

jeweils in schematischer Darstellung Verfahrensschritte beim Bilden der Hülle und Falten der Hülle zu einem fertigen Paket.

A device designed according to the invention for wrapping block-shaped bodies, in particular cube-shaped or cuboid products, such as butter, margarine or the like, is characterized in that the sleeve-forming station has sleeve-forming elements arranged at an angle relative to the block-shaped body, and the folding station has folding folders and, if appropriate, partial handle folds . A preferred embodiment of the invention is shown in the drawing and is explained in more detail below. Show it:

Figure 1

a packaging layer as a rotary machine for producing a packaging according to the invention,

Figure 2

a package according to the invention on an enlarged scale,

Figure 3

a supervision of a packaging blank as well as a folding stamp of the packaging system arranged for this purpose,

Figure 4

1 shows a perspective illustration of a folding tool interacting with the folding stamp of the packaging system,

Figure 5

a detail of the folding tool,

Figure 6

part of an envelope forming station with folding triangles,

Figure 7

part of the envelope forming station with folding strips,

Figure 8

part of the envelope forming station with a folding box,

Figure 9

a shell formed in the shell forming station,

Figures 10 to 16

each in a schematic representation of process steps in forming the envelope and folding the envelope into a finished package.

In Figure 1, a packaging system is shown in which a roll of material 1 2, for example made of oriented polypropylene or aluminum-clad Plastic film removable with the help of rollers 6 and one designed as a rotary machine Packaging machine 3 can be fed. Instead of the rotary machine, you can also use a so-called longitudinal runner can be provided. Between roller 1 and roller pair 6 the material web 2 is deflected around a deflection roller 4 in such a way that between the roll 1 and the packaging machine 3, the material web 2 essentially runs horizontally. The direction of travel of the material web is indicated by arrow 5. Between the pair of rollers 6 and the packaging machine 3 there is a cross cutting device arranged in the form of a knife 7, with which the material web 2 to form Blanks 8 is severable.

The packaging machine 3 includes an envelope forming station 9 and one with the Folding station indicated by arrow 11. Between the envelope forming station 9 and the Folding station 11, a filling station 12 is arranged, with the help in more detail below described a block body in the form of a cube or cuboid pasty product, such as butter, margarine, soup paste, yeast or the like can be filled. The product is in a manner known per se in a the envelope forming station 9 filled 10, which may be in Envelope chambers in a direction of rotation indicated by the arrow 20 in different Workstations of the packaging machine can be transported. From the envelope 10 a finished package 13 is formed in a manner explained in more detail below, as is shown in FIG Figure 2 is shown.

Details of the envelope forming station 9 are described in more detail below. First of all, it is sufficient to point out that to the envelope forming station 9 Fold stamp 14 belongs, which is indicated in Figure 1 and in the sense of the double arrow 14 ' can be moved up and down. The relative position of this folder 14 opposite the essentially square or, depending on the product to be wrapped, rhombus-shaped Cutting 8 results from FIG. 3. The transport direction 5 of the cutting 8 is indicated in Figure 3 on the center line 15 of the blank 8. The side edges 16, 17 of the Folding stamp 14 run to the longitudinal edges 18, 19 of the blank 8 under one Angle. This angular position results in different fold areas or corners, as explained in more detail below. One end edge 21 (see also FIG. 10) of the Folding stamp 14 is preferably on the center line 15, while the diagonal opposite end edge 22 depending on the angular position of the folder 14 at a distance is offset from the center line 15 of the blank. Depending on what is to be filled The distance varies depending on the product or its dimensions. To this Way between the center line 15 of the blank 8 and a diagonal 14 "of Folding stamp 14 forms an angle α, which can be up to 15 °. The diagonal 14 '' can be offset parallel to the center line 15 or offset.

In the case of a rhombus-shaped configuration of the cut 8, the cut edges run obliquely d. H. compared to a right angle at a different angle β up to 15 °.

FIGS. 4 and 5 show a typical structure of an envelope forming station 9. At the upper end is the one already explained in connection with FIG. 1 Folding stamp 14. Below that are two folding triangles 25 at a mutual distance arranged. Below these there are also two at a distance from each other Folding strips 26 and coaxially with it a folding box 27. A supervision according to FIG. 5 shows that the folding strips 26 are rounded and inclined folding surfaces 28 have their interaction as well as that of the other shell-forming elements result from the figures 6 to 9 described below.

As can be seen from FIG. 6, the blank 8 is in relation to the folder 14 and the Passage between the two folding triangles 25 chosen such that two diagonally opposite corners of the blank 8 substantially in the middle between the Folding triangles come to rest. The angle at the tips of the blank is β ' designated. If the folder 14 moves downwards in the direction of the arrow 14 ' and is moved between the folding triangles 25, the results in lower part of the figure shown in Figure 6, d. H. two essentially triangular folding tabs 29, 31 have formed which diametrically opposite.

According to FIG. 7, the blank 8 with the folded-up folds 29, 31 is now also included With the help of the folder 14 further down through the distance a from each other arranged folding strips 26 pushed through, due to the special Design of the folding surfaces 28 of the folding strips 26 in the corner region of the folding stamp 14 Internal folds 32 result, which are shown in Figure 8. Such a pre-folded one Blank 8 is finally with the help of the folder 14 through the below Folding strips 26 lying folding box 27 pushed through, because of opposite rounded guide surfaces 33, which in the actual folding shaft 34th pass, now also left and right protruding folding tabs 35, 36 of the Fold the cover 10 upwards, as can be seen in FIG. 9.

By changing the angle β ', the angles σ and ε at the folding tips 29 change, 31 or 35, 36. The dimension a essentially determines the angle α 'at the folding tip 35, 36.

For better understanding, the envelope formation and subsequent folding processes explained in more detail with reference to FIGS. 10 to 16. So first of all the Folding stamp 14 in the depending on the dimensions of the to be wrapped Fold stamp 14 arranged at an angle to the blank 8 for this purpose used, with the aid of the folding and wrapping elements explained above, such as folding triangles 25, the folding strips 26 and the folding box 27 a cover 10 form as shown in Figure 11. The folding tips 29, 31 and 35 and 36, the are connected to each other via the inner folds 32 have one more or less vertical position (Figure 11). In this position the die or cuboid-shaped shell 10 in the filling station 12 with a pasty product, such as Butter, margarine, soup paste, yeast or the like, filled.

In FIG. 12, a folding switch 37 is formed using a movable slide the tip tip 38 of the folding tip 36 over an edge of a rigid folding member 39 thrown. In Figure 13 is arranged with the help of an outside, also as a knife gate valve trained folding switch 41 of the folding tip 36 over the area of filled product folded, the tip 38 as to open the package trained grip part initially in a more or less vertical position remains.

In Figure 14 is by a folding folder arranged on the opposite side 42 the other end folding tab 35 is folded back onto the product. Doing so the tip 38 not yet in contact is folded back by 180 ° onto the folding tip 36.

As can be seen from FIG. 15, by means of one on the long side of the pack 13 arranged first folding folder 43 of the folding tip 29 located on the long side turned inside.

Finally, in FIG. 16, the package 13 is completed by switching one the casing 10 receiving casing or product chamber in the packaging machine 3 the last folding tip 31 is folded inwards. This happens either in conjunction with a rigid folding switch 44 or by a movable folding folder 45 Wrapping of the product with packaging material is now complete. If desired or may be required before folding the last folding tip 31 between it Inside and the top side of the previously folded folding tip 29 Glue point, for example a food-safe permanent glue point applied become.

Due to the relative angularly offset arrangement of the folding stamp 14 or the envelope-forming elements compared to the blank 8, depending on the format size, one results Packaging material savings of between 25% and 30% compared to conventional floor folding, where the side edges of the folder and the longitudinal edges of the blank run parallel to each other. For example, in the invention for a product format of 30 x 24 x 9 mm a blank in the order of approx. 59 x 59 mm and For example, for a product size of 40 x 30 x 10 mm, a blank in the Dimensions of approx. 74 x 74 mm are required.

The angular position between the blank and the shell-forming elements can thereby be achieved that the feed of the blank at an angle to the Envelope formation elements takes place or in that the envelope formation elements for Feed direction of the blank can be arranged at an angle.

Claims (20)

Packaging for wrapping block-shaped bodies, in particular cuboid and cuboid products, such as butter, margarine, soup paste, yeast or the like, with a sleeve (10) cut and folded from a material web (2), characterized in that the sleeve (10) from an approximately square blank (8) of the material web (2) is formed and is wrapped around the body in the manner of an envelope fold with diagonally opposite folding tabs (29, 31, 35, 36). Packaging according to claim 1, characterized in that the envelope (10) is formed by a substantially rhombic blank (8). Packaging according to claim 1 or 2, characterized in that at least on the opening side of the packaging in the corner areas there are internal folds (32) which preferably encompass the corners on two diagonally opposite end faces and the top of the packaging. Packaging according to one or more of claims 1 to 3, characterized in that the material web is formed from a plastic film, for example from oriented polypropylene. Packaging according to one or more of claims 1 to 3, characterized in that the material web is formed from paper laminated with aluminum. Packaging according to Claim 5, characterized in that a handle part (38) which is folded back essentially by 180 ° is folded onto an inner folding tip (36). Packaging according to one or more of claims 1 to 6, characterized in that an external folding tip (31) is connected to an underlying folding tip (29) via an adhesive point, preferably a permanent adhesive point (46), or detachably connected to the underlying folding tip by means of a pressure sensitive adhesive is. Method for wrapping block-shaped bodies, in particular cube-shaped or cuboid products, such as butter, margarine, soup paste, yeast or the like, with a blank of a material web supplied to a casing-forming and folding station, characterized in that a cube-shaped or cuboid-shaped material is to be wrapped from the material web Product-adapted, approximately square or rhombus-shaped blank is cut off and folded around the body relative to the base surface of the body to be wrapped at an angle forming a diagonally opposite folding tip in the manner of an envelope fold. A method according to claim 8, wherein the substantially planar blank is pushed through a folding tool with the aid of a folding stamp to form an envelope which is open on one side, characterized in that the blank is cut approximately square from a web of material pulled off a roll and depending on the dimension of the product to be wrapped is fed at an angle relative to the folder. A method according to claim 9, characterized in that the blank is substantially rhombic in shape and one of the substantially vertical end edges of the folding die preferably lies on the center line of the supplied blank and that a second end edge of the folding die lying diagonally to the end edge lies at a distance from the center line or with the first end edge lies on a diagonal, which, starting from the first end edge, deviates from the center line of the blank by up to 15 °. A method according to claim 10, characterized in that the cut edges lying transversely to the transport direction of the rhombus-shaped blank run at an angle deviating from the right angle to the edge edges running parallel to the transport direction, which is up to 15 °. A method according to claim 11, characterized in that two diagonally opposite folding angles of the rhombus-shaped blank formed at an acute angle lie essentially in the extension of the center line of the folding stamp. Method according to one or more of claims 7 to 12, characterized in that the tip of the folding tip, which is formed at an acute angle, is additionally folded outwards to form a grip part and folded back onto the folding tip. Device for wrapping block-shaped bodies, in particular cube-shaped or cuboid products, such as butter, margarine, soup paste, yeast or the like, with a blank cut from a material web (2) and folded into a cover (10) with a cover-forming and Folding station (9, 11), characterized in that the envelope forming station (9) has envelope forming elements (14, 25, 26, 27) arranged at an angle relative to the body to be wrapped. Apparatus according to claim 14, characterized in that the envelope-forming elements each have paired folding triangles (25) and folding strips (26). Apparatus according to claim 14 or 15, characterized in that the envelope forming station (9) has a folding stamp (14) arranged on one side of the supplied blank (8) and a folding box (27) arranged on the opposite side of the blank (8) optionally has an envelope chamber located below it. Apparatus according to claim 16, characterized in that the folding strips (26) and / or the folding box (27) in the corner regions of the sleeve (10) formed by the blank (8) each have an inner fold (32), preferably obliquely running fold surfaces (28 ) having. Device according to one or more of claims 14 to 17, characterized in that the folding station (11) on at least one side of the body to be folded handle part folder (37, 39) and preferably on all sides folding folder (41, 42, 43, 44, 45) having. Apparatus according to claim 18, characterized in that at least some of the folding folders (41, 42, 43, 45) are designed as plate slides. Device according to one or more of claims 14 to 19, characterized by a transverse separating device (7) and optionally an adhesive application device in the area of the supplied material web (2).

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